I wish that all project managers knew how to write code. In my experience this is not the case. None of the time that I spent managing software projects was while I knew how to code. That's about 1 year doing vendor evaluation for a non-profit, 11 months doing requirements docs and manual QA, and 7 months in a 'Scrummaster' role.

If you find that so surprising, you should consider yourself a lucky developer ;-)